$ git clone -n https://src.fedoraproject.org/rpms/php-pecl-xdebug3.git /var/lib/mock/f42-build-862775-171084/root/chroot_tmpdir/scmroot/php-pecl-xdebug3
Cloning into '/var/lib/mock/f42-build-862775-171084/root/chroot_tmpdir/scmroot/php-pecl-xdebug3'...
$ git fetch origin 62b1e7feb0f4f5d14cc51ac1df9c4f250a209d29:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-pecl-xdebug3
 * [new ref]         62b1e7feb0f4f5d14cc51ac1df9c4f250a209d29 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 62b1e7f v3.4.0